To generate FireSim
testharness CHIRRTL file, run:
cd sims/vcs
make launch-sbt
runMain firechip.chip.Generator --target-dir /scratch/joonho.whangbo/coding/chipyard-fame5/sims/vcs/generated-src/firechip.chip.FireSim.FireSimRocketConfig --name firechip.chip.FireSim.FireSimRocketConfig --top-module firechip.chip.FireSim --legacy-configs firechip.chip:FireSimRocketConfig